Shade and reflector



- Patented Nov. 25,1919.

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D RE .DH Nfl GAN. 0 r LII HD... AA HN sl. P DI f af,... N /w -side elevation of the device HENRY G. LEWIS, 0F PHILADELPHIA, PENNSYIIANIA, ASSIGNOR TO ELECTRIC SERVICE SUPPLIES COMPANY, OF PHILADELPHIA, PENNSYLVANIA, A COR- PORATION OF PENNSYLVANIA.

SHADE AND REFLECTOR.

Specicaton of Letters Patent.

Application filed June 9, 1917. Serial No. 173,708.

To all whom 'it may concer/n:

Be it known that I, HENRY G. Lnwis, a citizen of the United States, residing in the city of Philadelphia, county of Philadelphia, and State of Pennsylvania, have invented Improved Shades and Reflectors, of which the following a specification.

My invention is an improved device designed for sha-ding and diffusing light and throwing a beam upon an object which it is desired to illuminate highly.

A use of my improved device is found in lighting street cars, for example, where it is desirable to shade and diffuse the light from lamps for the purpose of obtaining satisfactory general illumination and, at the same time, to throw beams from particular lamps upon objects, as registers, desirable to illuminate so that theyy can be read with greater facility.

The characteristic features of my invention are disclosed more specifically inthe following description and the accompanying drawings in illustration thereof,

In the drawings, Figure l is a top plan view of a device embodying a forni of my invention selected for the purpose of illustrating an application thereof; Fig. 2 is a shown in Fig. l in combination with a lamp; and Fig. 3 is a side elevation of mechanism shown in Fig. 2 turned through an angle of 90y degrees and a dial disposed in the path of a beam of light reflected by the mechanism.

In the form of the invention here selected for the purpose of illustrating an application thereof, a glass shade and reflector of paraboloidal character inits general contour, is provided with a translucent or semiopaque portion l and the transparent portion 2. The translucent character is im` parted in any usual manner, as by enameling cr frosting the glass by'which it is desired to diffuse subdued light from the lamp 3, and the clear portion 2 preferably has the character adapted for permitting the passage without substantial obstruction of the direct and reflected light from the lamp to an object, such as the dial 1l.

The device thus effects the desidera-ta of diusing light from the lamp, subduing the direct rays in the line of vision of those which it is throwing substanin the field of light, and

direct tially unobstructed and unmodified and reflected light upon highly illuminated.

It is generally desirable that cars be equipped with lamps provided with reflectors on account of their much higher lighting efficiency, better diffusion, better appearance, and greater comfort to passengers. Many cars areV provided with obje-cts, such as destination signs and registers, have been illuminated heretofore, more or less imperfect-ly7 by bare lamps, and where the usual improved reiiecting and diffusing fixtures were added the illumination of these objects was greatly reduced. This device effects the desired reiiection and illu'- mination of light not only without the imperfect illumination of signs and other objects used for visually conveying intelligence, but it is adapted for accentuating theilluniination of such objects as signs by throwing direct and vreflected light with substantial uniformity over the entire area to be read.

Having described my invention, I claim:

l. A parabolic shade and reflector expanding to an opening and having a transparent section and a translucent section adapted for reflecting light through said opening and said transparent section.

2. Aglassshade and reflector of substantially paraboloidal contour having a transparent section and a translucent section.

adapted for diffusing subdued light and for reflecting a beam of light through said transparent section.

3. i glass shade and reflector having a relatively small transparent parabolic section and a comparatively large translucent parabolic section adapted for diffusing subdued light and for reflecting a beam of light through said transparent section.

' 4.-. A shade and reflector expanding to an opening and having a transparent parabolic section and a translucent section, said translucent parabolic section adapted to reflect light through said opening and said transparent section.

vIn testimony whereof, I have hereunto set my name this 4th day of June, 1917. H. Gr. LEWIS.

Patented Nov. 25, isis. Y

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